subsequent accuracy assessment. To do so, 100 reference points were used to train pixels and hundred
GPS data were used for classification accuracy. Again in 2007, a field study (12–24 February) was
conducted in the study area to obtain reference data for 2005 image classification. Note that an image from
the Google Earth© and a false color composite of IRS-1 Dimage (RGB 321) depicting different land cover types were printed on A0 size papers and taken to the field fordata collection. In the field, these color hard copies were used to identify the existing land cover features and special attention was paid for the spectrally similar covers on the IRS data. Thus a ground truth map was prepared to locate the training pixels on the image.
Additionally, 110 reference points (Fig. 1) were recorded by a GPS and put into a GIS for evaluating
accuracy of the derived land cover of 2005.